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<title>第十二章
响应鼠标和键盘事件</title>
<meta name=Description content=2008-3-24>
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<div style='mso-line-spacing:"120 20 0";position:absolute;top:7.5%;left:10.11%;
width:85.58%;height:5.25%'><span lang=EN-US style='mso-fareast-language:ZH-CN'><b>4.
</b></span><span style='font-family:SimSun;mso-fareast-font-family:SimSun'><b>参数</b></span><span
lang=EN-US style='mso-fareast-language:ZH-CN'><b>X</b></span><span
style='font-family:SimSun;mso-fareast-font-family:SimSun'><b>、</b></span><span
lang=EN-US style='mso-fareast-language:ZH-CN'><b>Y<span
style='mso-spacerun:yes'> </span> </b></span></div>
<div style='mso-line-spacing:"120 20 0"'><span style='position:absolute;
top:14.49%;left:10.11%;width:102.43%;height:5.75%'><span lang=EN-US
style='mso-fareast-language:ZH-CN'><b><span
style='mso-spacerun:yes'> </span>X,
Y</b></span><span style='font-family:SimSun;mso-ascii-font-family:SimSun;
mso-fareast-font-family:SimSun'><b>鼠标指针的位置，</b></span><span
style='font-family:SimSun;mso-ascii-font-family:SimSun;mso-fareast-font-family:
SimSun;mso-hansi-font-family:Verdana'><b>通过</b></span><span
lang=EN-US style='font-family:Verdana;mso-ascii-font-family:Verdana;
mso-fareast-language:ZH-CN'><b>X</b></span><span style='font-family:SimSun;
mso-ascii-font-family:SimSun;mso-fareast-font-family:SimSun'><b>和</b></span><span
lang=EN-US style='mso-fareast-language:ZH-CN'><b>Y</b></span><span
style='font-family:SimSun;mso-ascii-font-family:SimSun;mso-fareast-font-family:
SimSun'><b>参数返回一个指定鼠</b></span></span><span
style='position:absolute;top:21.25%;left:10.11%;width:102.43%;height:5.25%'><span
style='font-family:SimSun;mso-ascii-font-family:SimSun;mso-fareast-font-family:
SimSun'><b>标指针当前位置的数，</b></span><span
lang=EN-US style='mso-fareast-language:ZH-CN'><b>X</b></span><span
style='font-family:SimSun;mso-ascii-font-family:SimSun;mso-fareast-font-family:
SimSun'><b>和</b></span><span lang=EN-US style='mso-fareast-language:
ZH-CN'><b>Y</b></span><span style='font-family:SimSun;mso-ascii-font-family:
SimSun;mso-fareast-font-family:SimSun'><b>的值是使用该对象</b></span><span
style='font-family:SimSun;mso-ascii-font-family:SimSun;mso-fareast-font-family:
SimSun;mso-hansi-font-family:Verdana'><b>的坐标系统</b></span></span><span
style='position:absolute;top:27.75%;left:10.11%;width:85.58%;height:5.25%'><span
style='font-family:SimSun;mso-ascii-font-family:SimSun;mso-fareast-font-family:
SimSun;mso-hansi-font-family:Verdana'><b>表示</b></span><span
style='font-family:SimSun;mso-ascii-font-family:SimSun;mso-fareast-font-family:
SimSun'><b>鼠标指针当前位置。</b></span><b>
</b></span></div>
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<div style='mso-line-spacing:"100 50 0";position:absolute;top:39.25%;
left:10.11%;width:83.14%;height:4.75%'><span style='font-family:SimSun;
mso-fareast-font-family:SimSun;color:red'><b>注意： </b></span></div>
<div style='text-align:justify;mso-line-spacing:"100 50 0";position:absolute;
top:46.75%;left:10.11%;width:83.14%;height:26.5%'><span style='font-family:
"Times New Roman";mso-ascii-font-family:"Times New Roman";mso-fareast-font-family:
KaiTi_GB2312'><b><span
style='mso-spacerun:yes'>
</span></b></span><span style='font-family:KaiTi_GB2312;mso-fareast-font-family:
KaiTi_GB2312'><b>鼠标事件被用来识别和响应各种鼠标状态，并把这些状态看作独立的事件，在按下鼠标按钮并释放时，</b></span><span
lang=EN-US style='font-family:"Times New Roman";mso-ascii-font-family:"Times New Roman";
mso-fareast-font-family:KaiTi_GB2312;mso-fareast-language:ZH-CN'><b>Click </b></span><span
style='font-family:KaiTi_GB2312;mso-fareast-font-family:KaiTi_GB2312'><b>事件只能把此过程识别为一个单一的单击操作。鼠标事件能够区分各鼠标按钮及键盘的</b></span><span
lang=EN-US style='font-family:"Times New Roman";mso-ascii-font-family:"Times New Roman";
mso-fareast-font-family:KaiTi_GB2312;mso-fareast-language:ZH-CN'><b>SHIFT</b></span><span
style='font-family:KaiTi_GB2312;mso-fareast-font-family:KaiTi_GB2312'><b>、</b></span><span
lang=EN-US style='font-family:"Times New Roman";mso-ascii-font-family:"Times New Roman";
mso-fareast-font-family:KaiTi_GB2312;mso-fareast-language:ZH-CN'><b>CTRL</b></span><span
style='font-family:KaiTi_GB2312;mso-fareast-font-family:KaiTi_GB2312'><b>、</b></span><span
lang=EN-US style='font-family:"Times New Roman";mso-ascii-font-family:"Times New Roman";
mso-fareast-font-family:KaiTi_GB2312;mso-fareast-language:ZH-CN'><b>ALT </b></span><span
style='font-family:KaiTi_GB2312;mso-fareast-font-family:KaiTi_GB2312'><b>键的状态。</b></span><span
style='font-family:SimSun;mso-fareast-font-family:SimSun;mso-special-format:
lastCR;display:none'><b> </b></span></div>
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style='position:absolute;top:78.5%;left:8.42%;width:102.05%;height:5.25%'><span
style='color:red'><b><span style='mso-spacerun:yes'> </span></b></span><span
style='font-family:SimSun;mso-fareast-font-family:SimSun;color:red'><b>例</b></span><span
style='color:red'><b><span style='mso-spacerun:yes'> </span></b></span><span
style='font-family:SimSun;mso-ascii-font-family:SimSun;mso-fareast-font-family:
SimSun'><b>使用</b></span><span lang=EN-US style='mso-fareast-language:
ZH-CN'><b>MouseUp </b></span><span style='font-family:SimSun;mso-ascii-font-family:
SimSun;mso-fareast-font-family:SimSun'><b>与</b></span><b> MouseDown </b><span
style='font-family:SimSun;mso-ascii-font-family:SimSun;mso-fareast-font-family:
SimSun'><b>和</b></span><span lang=EN-US style='mso-fareast-language:
ZH-CN'><b>MouseMove </b></span><span style='font-family:SimSun;mso-ascii-font-family:
SimSun;mso-fareast-font-family:SimSun'><b>事件，编</b></span></span><span
style='position:absolute;top:85.0%;left:8.42%;width:85.58%;height:5.25%'><span
style='font-family:SimSun;mso-ascii-font-family:SimSun;mso-fareast-font-family:
SimSun'><b>写一个在窗体上用鼠标绘图的简单程序。</b></span><b>
</b></span></div>
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